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a technology of expanding vertebrae and spacers, which is applied in the field of expanding vertebrae, can solve the problems of affecting the ability of bone and bone structures to provide support and structure, and the ability of bone and bone structures to be susceptible, so as to maintain the separation of bone and bone of the joint, and increase the height of the spacer
Active Publication Date: 2017-02-09
GLOBUS MEDICAL INC
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[0006]In one embodiment thereof, the carriage includes at least two ramped surfaces, and the second endplate includes at least one ramped surface mateable with at least one of the at least two ramped surfaces of the carriage, whereby when the carriage is slideably moved by rotation of the actuator screw, the at least one second endplate ramped surface slides against the at least one additional carriage ramped surface to cause the second endplate to move along an axis transverse to the longitudinal axis to increase a height of the spacer.
[0009]In yet further embodiments thereof, the actuator screw includes a flange, and the carriage includes a flange rotatably mateable with the actuator screw flange; the spacer further includes a thrust washer interposed between the actuator screw and the carriage; the spacer further includes a polymeric material configured to press against the actuator screw to reduce a potential for unintended rotation of the actuator screw; and the spacer further includes a plate having at least one aperture sized and dimensioned to receive an elongated fastener for fastening the spacer to bone of the joint, the plate being releasably detachable from the spacer to reduce an profile of the spacer during insertion of the spacer into the body, the plate attached to the spacer inside the body.
[0018]In another embodiment of the disclosure, a method for therapeutically maintaining a separation of bones of a joint, comprises inserting a spacer between bones of the joint, the spacer including—a frame having distal and proximal ends defining a longitudinal axis extending therebetween; a carriage slideably retained within the frame and having at least one ramped surface, the carriage further including a flange; an actuator screw threadably engaged with the frame, the actuator screw including a flange rotatably mateable with the carriage flange, whereby the carriage is slideably moved when the actuator screw is rotated; a first endplate configured to engage a first bone of the joint, and having at least one ramped surface mateable with the at least one carriage ramped surface, whereby when the carriage is slideably moved by rotation of the actuator screw in a first direction, the at least one endplate ramped surface slides against the at least one carriage ramped surface to cause the first endplate to move along an axis transverse to the longitudinal axis to increase a height of the spacer; and a second endplate configured to engage a second bone of the joint; the spacer inserted when the first endplate is positioned proximate the frame; and slideably moving, by rotation of the actuator screw, the at least one endplate ramped surface against the at least one carriage ramped surface to cause the first endplate to move along an axis transverse to the longitudinal axis to increase a height of the spacer to maintain a separation of bones of the joint.
Problems solved by technology
Bones and bony structures are susceptible to a variety of weaknesses that can affect their ability to provide support and structure.
Method used
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[0070]As required, detailed embodiments are disclosed herein; however, it is to be understood that the disclosed embodiments are merely examples and that the systems and methods described below can be embodied in various forms. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present subject matter in virtually any appropriately detailed structure and function. Further, the terms and phrases used herein are not intended to be limiting, but rather, to provide an understandable description of the concepts.
[0071]The terms “a” or “an”, as used herein, are defined as one or more than one. The term plurality, as used herein, is defined as two or more than two. The term another, as used herein, is defined as at least a second or more. The terms “including” and “having,” as used herein, are defined as comp...
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Abstract
A joint spacer therapeutically maintains separation of bones of a joint. A carriage is slideably retained within the frame and has at least one ramped surface. An actuator screw is threadably engaged with the frame, and rotatably connected to the carriage, to cause the carriage to slideably move within the frame when the actuator screw is rotated. First and second endplates engage the bones of the joint, and each has at least one ramped surface that is mateable with the ramped surface of the carriage, whereby when the carriage is slideably moved by rotation of the actuator screw, the endplates ramped surface slides against the carriage ramped surface to cause the endplates to move along an axis transverse to the longitudinal axis of the frame, to increase the height of the spacer. Piercing elements are connected to the carriage to pierce bone of the joint when the carriage is moved.
Description
CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation application of U.S. patent application Ser. No. 13 / 711,204, filed Dec. 11, 2012. This application is also a continuation-in part of U.S. patent application Ser. No. 14 / 940,322, filed on Nov. 13, 2015, which is a continuation of U.S. patent application Ser. No. 13 / 845,645, filed on Apr. 3, 2013, now U.S. Pat. No. 9,216,095, which is a continuation-in-part of U.S. patent application Ser. No. 13 / 451,230, filed on Apr. 19, 2012, now U.S. Pat. No. 8,518,120, which is a continuation-in-part of U.S. patent application Ser. No. 13 / 440,158, filed on Apr. 5, 2012, now U.S. Pat. No. 8,679,183, which is a continuation-in-part of U.S. patent application Ser. No. 13 / 273,994, filed on Oct. 14, 2011, now U.S. Pat. No. 9,358,126, which is a continuation-in-part of U.S. patent application Ser. No. 12 / 823,736, filed on Jun. 25, 2010, now U.S. Pat. No. 8,685,098, which is a continuation of U.S. patent application Ser. No. 1...
Claims
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Application Information
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Patent Type & Authority Applications(United States)